Make a simple file on desktop to shutdown the Windows based system when you double click on it.
shutdown -s -f -t 10
And after this save it in the .bat extension. The main advantage of this code is that you gave the time to shutdown the system. In the above example we gave it 10 seconds to shutdown. It is your choise to gave the time to shutdown the system.
And if you accedently click on this file then for stopping this process you write the following code on the notepad.
shutdown -a
And save it also in the .bat extension on the desktop and double click on it. This can stop the process of shutdown.